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<a name="help-system"></a><p>These classes provide for all forms of online-help in your application, with three levels of detail:</p>
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<li>Tool Tips and Status Bar message - flyweight help, extremely brief, entirely integrated in the user interface, requiring little or no user interaction to invoke.</li>
<li>What's This? - lightweight, but can be a three-paragraph explanation.</li>
<li>Online Help - can encompass any amount of information, but is typically slower to call up, somewhat separated from the user's work, and often users feel that using online help is a digression from their real task.</li>
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<tr valign="top" class="odd"><th><a href="qassistantclient.html">QAssistantClient</a></th><td>Means of using Qt Assistant as an application's help tool</td></tr>
<tr valign="top" class="even"><th><a href="qhelpevent.html">QHelpEvent</a></th><td>Event that is used to request helpful information about a particular point in a widget</td></tr>
<tr valign="top" class="odd"><th><a href="qstatusbar.html">QStatusBar</a></th><td>Horizontal bar suitable for presenting status information</td></tr>
<tr valign="top" class="even"><th><a href="qstatustipevent.html">QStatusTipEvent</a></th><td>Event that is used to show messages in a status bar</td></tr>
<tr valign="top" class="odd"><th><a href="qtooltip.html">QToolTip</a></th><td>Tool tips (balloon help) for any widget</td></tr>
<tr valign="top" class="even"><th><a href="qwhatsthis.html">QWhatsThis</a></th><td>Simple description of any widget, i.e&#x2e; answering the question &quot;What's This?&quot;</td></tr>
<tr valign="top" class="odd"><th><a href="qwhatsthisclickedevent.html">QWhatsThisClickedEvent</a></th><td>Event that can be used to handle hyperlinks in a &quot;What's This?&quot; text</td></tr>
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